Light-hole Exciton in Nanowire Quantum Dot

Mathieu Jeannin (1) , Alberto Artioli (1) , Pamela Rueda-Fonseca (2) , Edith Bellet-Amalric (2) , Kuntheak Kheng (2) , Régis André (1) , Serge Tatarenko (1) , Joël Cibert (1) , David Ferrand (1) , Gilles Nogues (1)

1 NEEL - NPSC - Nanophysique et Semiconducteurs
2 NPSC - Nanophysique et Semiconducteurs

Quantum dots inserted inside semiconductor nanowires are extremely promising candidates as building blocks for solid-state based quantum computation and communication. They provide very high crystalline and optical properties and offer a convenient geometry for electrical contacting. Having a complete determination and full control of their emission properties is one of the key goals of nanoscience researchers. Here we use strain as a tool to create in a single magnetic nanowire quantum dot a light-hole exciton, an optically active quasiparticle formed from a single electron bound to a single light hole. In this frame, we provide a general description of the mixing within the hole quadruplet induced by strain or confinement. A multi-instrumental combination of cathodo-luminescence, polarisation-resolved Fourier imaging and magneto-optical spectroscopy, allow us to fully characterize the hole ground state, including its valence band mixing with heavy hole states.

Domaines: Matière Condensée [cond-mat]; Optique [physics.optics]

Mathieu Jeannin, Alberto Artioli, Pamela Rueda-Fonseca, Edith Bellet-Amalric, Kuntheak Kheng, et al.. Light-hole Exciton in Nanowire Quantum Dot. Physical Review B, 2017, 95 (3), pp.035305. ⟨10.1103/PhysRevB.95.035305⟩. ⟨hal-01402004⟩